wowEventQueryBackend

The events query backend of each aggregate type, by its events store: the store wow.aggregates.[<context>.<aggregate>].query.events.store names (an Elasticsearch store its event search Sink writes, say), else the store its log is on. The application's own EventQueryBackend bean when it has one, else the one of the query provider of the store's type: PostgreSQL's or MongoDB's over the log in place (the store's query-read-preference), Elasticsearch's over the Sink's events index, and a log in memory scanned in memory unless wow.query.memory.enabled is false, as its snapshots are queried then. Any other log, in memory without it, on a store whose type has no query provider, or the application's own, is not queried: its events model is not served, and an info log says so. A store named for a type that cannot serve its events queries fails the start.